Zolakwika zomwe zimachitika kawirikawiri komanso momwe mungapewere?
Zolakwika zomwe zimachitika popanga ma disc a mabuleki: dzenje la mpweya, kusowa kwa porosity, dzenje la mchenga, ndi zina zotero; Graphite yapakatikati ndi yamtundu womwe uli mu kapangidwe ka metallographic imaposa muyezo, kapena muyezo wa kuchuluka kwa carbide; Kulimba kwambiri kwa Brinell kumabweretsa zovuta pakukonza kapena kuuma kosagwirizana; Kapangidwe ka graphite ndi kolimba, mawonekedwe a makina sali okhazikika, kuuma kwake kumakhala koipa mukakonza, ndipo porosity yodziwikiratu pamwamba pa kuponyera imachitikanso nthawi ndi nthawi.
1. Kupanga ndi kupewa mabowo a mpweya: mabowo a mpweya ndi chimodzi mwa zolakwika zomwe zimachitika kwambiri pa ma brake disc castings. Zigawo za ma brake disc ndi zazing'ono komanso zoonda, liwiro lozizira komanso lolimba limakhala lachangu, ndipo palibe kuthekera kokwanira kwa mvula ya mabowo a mpweya ndi mabowo a mpweya obwera. Mafuta osungira mchenga wamafuta amakhala ndi mpweya wambiri. Ngati chinyezi cha nkhungu chili chochuluka, zinthu ziwirizi nthawi zambiri zimayambitsa ma pores olowa mu casting. Zapezeka kuti ngati chinyezi cha mchenga woumba chipitirira, kuchuluka kwa porosity scrap kumawonjezeka kwambiri; Mu ma castings ena owonda a mchenga, choking (choking pores) ndi surface pores (shelling) nthawi zambiri zimawonekera. Pamene njira ya hot core box yophimbidwa ndi resin imagwiritsidwa ntchito, ma pores amakhala oopsa kwambiri chifukwa cha kupanga mpweya waukulu; Nthawi zambiri, brake disc yokhala ndi mchenga wokhuthala nthawi zambiri imakhala ndi zolakwika za mabowo a mpweya;
2. Kupanga dzenje la mpweya: mpweya wopangidwa ndi pakatikati pa mchenga wa disc wa brake disc casting pa kutentha kwakukulu uyenera kutuluka kapena kulowa mkati mopingasa kudzera mumpata wa mchenga wa core pansi pa mikhalidwe yabwinobwino. Pakati pa mchenga wa disc umakhala woonda, njira ya mpweya imakhala yopapatiza ndipo kukana kwa madzi kumawonjezeka. Nthawi ina, chitsulo chosungunuka chikamiza msanga pakati pa mchenga wa disc, mpweya wambiri umatuluka; Kapena chitsulo chosungunuka kutentha kwambiri chikakhudza mchenga wambiri wamadzi (kusakanizirana kwa mchenga wosagwirizana) pamalo ena, zomwe zimayambitsa kuphulika kwa mpweya, kutsekereza moto ndikupanga ma pores otsekereza; Nthawi ina, mpweya wopangidwa ndi mphamvu yapamwamba umalowa mu chitsulo chosungunuka ndikuyandama ndikutuluka. Ngati nkhungu singathe kuitulutsa pakapita nthawi, mpweyawo udzafalikira kukhala mpweya pakati pa chitsulo chosungunuka ndi pansi pa nkhungu ya pamwamba, kutenga gawo la malo pamwamba pa diski. Ngati chitsulo chosungunuka chikulimba, kapena kukhuthala kwake kuli kwakukulu ndipo kutaya madzi, malo omwe mpweyawo umakhalamo sangadzazidwenso, Adzasiya ma pores pamwamba. Kawirikawiri, ngati mpweya wopangidwa ndi pakati sungathe kuyandama ndikutuluka mu chitsulo chosungunuka pakapita nthawi, umakhala pamwamba pa diski, nthawi zina umaonekera ngati mbowo imodzi, nthawi zina umaonekera pambuyo powombera kuti uchotse oxide scale, ndipo nthawi zina umapezeka pambuyo pokonza, zomwe zimapangitsa kuti pakhale maola ambiri ogwiritsira ntchito. Pamene brake disc core ili yokhuthala, zimatenga nthawi yayitali kuti chitsulo chosungunuka chikwere kudzera mu diski core ndikumiza diski core. Musanamizidwe, mpweya wopangidwa ndi pakati umakhala ndi nthawi yochulukirapo yoyenda momasuka kupita pamwamba pa core kudzera mu mchenga, ndipo kukana kuyenda kunja kapena mkati mopingasa nakonso kumakhala kochepa. Chifukwa chake, zolakwika za pamwamba pa mbowo sizimapangidwa kawirikawiri, koma ma pores osiyana amathanso kuchitika. Izi zikutanthauza kuti, pali kukula kofunikira kwambiri kopanga ma pores otsekeka kapena ma pores pamwamba pakati pa makulidwe ndi makulidwe a core ya mchenga. Pamene makulidwe a core ya mchenga ali ochepera kuposa kukula kofunikira kumeneku, padzakhala chizolowezi chachikulu cha ma pores. Kukula kofunikira kumeneku kumawonjezeka ndi kuwonjezeka kwa radial dimension ya brake disc komanso kuchepa kwa core ya disc. Kutentha ndi chinthu chofunikira chomwe chimakhudza ma porosity. Chitsulo chosungunuka chimalowa m'bowo la nkhungu kuchokera mkati mwa sprue, chimadutsa pakati pa diski podzaza, ndikumakumana moyang'anizana ndi sprue yamkati. Chifukwa cha njira yayitali, kutentha kumachepa kwambiri, ndipo kukhuthala kumawonjezeka moyenerera, nthawi yogwira ntchito ya thovu kuti likwere ndikutulutsa ndi yochepa, ndipo chitsulo chosungunuka chidzalimba mpweya usanatuluke kwathunthu, kotero ma pores ndi osavuta kuchitika. Chifukwa chake, nthawi yogwira ntchito ya thovu loyandama ndi kutulutsa imatha kutalikitsidwa powonjezera kutentha kwa chitsulo chosungunuka pa disk moyang'anizana ndi sprue yamkati.
